net: use object destructuring

PR-URL: #20959
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>
Reviewed-By: Benjamin Gruenbaum <benjamingr@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>

lib/net.js

@@ -82,8 +82,7 @@ const kLastWriteQueueSize = Symbol('lastWriteQueueSize');
 let cluster;
 let dns;
 
-const errnoException = errors.errnoException;
-const exceptionWithHostPort = errors.exceptionWithHostPort;
+const { errnoException, exceptionWithHostPort } = errors;
 
 const {
   kTimeout,
@@ -244,7 +243,7 @@ function Socket(options) {
 
   options.readable = options.readable || false;
   options.writable = options.writable || false;
-  const allowHalfOpen = options.allowHalfOpen;
+  const { allowHalfOpen } = options;
 
   // Prevent the "no-half-open enforcer" from being inherited from `Duplex`.
   options.allowHalfOpen = true;
@@ -259,7 +258,7 @@ function Socket(options) {
     this._handle = options.handle; // private
     this[async_id_symbol] = getNewAsyncId(this._handle);
   } else if (options.fd !== undefined) {
-    const fd = options.fd;
+    const { fd } = options;
     this._handle = createHandle(fd, false);
     this._handle.open(fd);
     this[async_id_symbol] = this._handle.getAsyncId();
@@ -434,7 +433,7 @@ Socket.prototype._onTimeout = function() {
   if (lastWriteQueueSize > 0 && handle) {
     // `lastWriteQueueSize !== writeQueueSize` means there is
     // an active write in progress, so we suppress the timeout.
-    const writeQueueSize = handle.writeQueueSize;
+    const { writeQueueSize } = handle;
     if (lastWriteQueueSize !== writeQueueSize) {
       this[kLastWriteQueueSize] = writeQueueSize;
       this._unrefTimer();
@@ -956,7 +955,7 @@ Socket.prototype.connect = function(...args) {
     this._sockname = null;
   }
 
-  const path = options.path;
+  const { path } = options;
   var pipe = !!path;
   debug('pipe', pipe, path);
 
@@ -991,10 +990,8 @@ Socket.prototype.connect = function(...args) {
 
 
 function lookupAndConnect(self, options) {
+  var { port, localAddress, localPort } = options;
   var host = options.host || 'localhost';
-  var port = options.port;
-  var localAddress = options.localAddress;
-  var localPort = options.localPort;
 
   if (localAddress && !isIP(localAddress)) {
     throw new ERR_INVALID_IP_ADDRESS(localAddress);